Process of preparing calcium carbid.



- of Calcic and other Carbids, (for which I have ceptacles.

S such substances as a mixture of petroleum, glucose, and carbonate oflime, a mixture of (.nsTER, a subjectof the Queen of Great Brit- .ofiacetylene gas, which defect renders it UNITED STATES Y EDXVAR-D\VILLIAL\[ LANCASTER,

OF VES'lMINSIER, ENGLAND.

PROCESS OF PREPARING CALCIUM CARBID.

SPECIFICATION forming part of Letters Patent No. ($3,562, dated October1, 1901.

Application filed October 8, 1900. $eria1No 32,399- (No specimens.)

To all whom, it may concern Be it known that I, EDWARD WILLIAM LAN- ain,residing at flS-Victoria street, Westminster, England, have inventedcertain new .and useful Improvements in the Preparation applied forLetters Patent in Great Britain, such application being numbered9,334and bearing date May. 21, A. D. 1900,) of which the following. is aspecification.

As is well known, calcic and other car-bids when, exposed to the airabsorb moisture therefrom and become decomposed, giving necessary toprotect such carbids from the atmosphere by storing them in air-tight reThe attempts hitherto made to prevent the decomposition of earbids havebeen in the direction of coating the lumps of carbid withparaffin-wax,cocoa-butter, and sugar, and other substances which willform an impervious coating on the outside of the carbid. These coatingshave the disadvantage that it may be necessary, to break the lumps of'carbid before placing them in the generator in order to allow freeaccess of water-to the carbid. 5

The object of this 'invention is to obviate the defects incidental toordinary carbids and carbids treated as above described by treating'calcic and other carbids with certain substances which will protect themfrom the action of atmospheric moisture and also retard thedecomposition of the carbide when immersed in water and preventtoo-rapid generation of acetylene gas.

' Now according to this invention I saturate or partly saturate thecarbid with creosote, either plain-or diluted,with crude'pctroleu m,kerosen or othcrsuitable hydrocarbon or othenliq-uid which will notdecompose the carbid. It the carbid has to be stored for anyconsiderable length of time, I immerse lumps of carbid in a bath ofcommercial cre osote, to which may be added a little petrole um orkerosene or other suitable hydrocan time only, the creosote may belargely diluted with petroleum, kerosene,orother suitable,

liquid which will not decompose the carbid,the effect of using dilutedcreosote being to render it unnecessary to neutralize the effect of thecreosote before using the carbidj When using diluted creosote, I mayproceed in either of two ways. I may immerse-lumps of carbid in a bathof petroleum, kerosene, or other suitable hydrocarbon and when thecarbid is sufficiently saturated'I remove-it from the bath and immerseit in a bath of creosote,to which may be added a little petroleum orkerosene. The carbid after its removal from the creosote-bath may beexposed to the air for some time without decompositionand consequentevolution of acetylene gas, and when immersed in water the treatedcarbid is decomposed much more slowly than carbid which has notundergone the above treatment,- or I may use one bath only'in which thecarbid is immersed, the said bath consisting of commercial creosote, onepart, and petroleum or kerosene four parts.

What I claim as new, and desire to secure by Lette s la'ent, is

1. Js new article of manufacture a prepart d can bid consisting ofcalcic or other carbid saturatoil or partly saturated with creosote forthe purpose stated.

2. As a new article of manufacture a pre

